如何在 React Native 中将图像放置在其他图像之上？

Question

我放置了一个图像作为根节点，以使其成为我的视图的背景。但似乎所有其他图像都变得不可见...... 有没有办法使用内置组件将图像放置在背景之上，而不需要任何插件？
在下面的代码示例中，landing-background 用作背景，我的logo 图像可见，但只有在背景被移除时才可见。
Text 显示在背景之上，没有任何问题...

    <View style={styles.container}>
            <Image source = {require('./img/landing-background.jpg')}
              resizeMode = 'cover' style = {styles.backdrop}>
              <View style = {styles.overlay}>
                <Text style = {styles.headline}>It should appear in front of the Background Image</Text>
    <Image style = {styles.logo} source = {require('./img/logo.png')} />
              </View>

              </Image>
    </View>

var styles = StyleSheet.create({
      container: {
        flex: 1,
        alignItems: 'center',
      },
      overlay: {
        opacity: 0.5,
        backgroundColor: '#000000'
      },
      logo: {
        backgroundColor: 'rgba(0,0,0,0)',
        width: 160,
        height: 52
      },
      backdrop: {
        flex:1,
        flexDirection: 'column'
      },
      headline: {
        fontSize: 18,
        textAlign: 'center',
        backgroundColor: 'rgba(0,0,0,0)',
        color: 'white'
      }
    });

Answer 1

我认为您最好将内容包装在absolutely 定位的元素中，然后将其拉伸以覆盖屏幕，而不是将您的内容包装在<Image> 中。

<View style={styles.container}>
  <View style = {styles.backgroundContainer}>
    <Image source = {require('./img/landing-background.jpg')} resizeMode = 'cover' style = {styles.backdrop} />
  </View>
  <View style = {styles.overlay}>
    <Text style = {styles.headline}>It should appear in front of the Background Image</Text>
    <Image style = {styles.logo} source = {require('./img/logo.png')} />
  </View>
</View>

var styles = StyleSheet.create({
  backgroundContainer: {
    position: 'absolute',
    top: 0,
    bottom: 0,
    left: 0,
    right: 0,
  },
  container: {
    flex: 1,
    alignItems: 'center',
  },
  overlay: {
    opacity: 0.5,
    backgroundColor: '#000000'
  },
  logo: {
    backgroundColor: 'rgba(0,0,0,0)',
    width: 160,
    height: 52
  },
  backdrop: {
    flex:1,
    flexDirection: 'column'
  },
  headline: {
    fontSize: 18,
    textAlign: 'center',
    backgroundColor: 'black',
    color: 'white'
  }
});

Answer 2

我有同样的问题，我使用了<ImageBackground>

<View style={{height: 55,width: 55,justifyContent: 'center',alignItems: 'center'}}>

   <ImageBackground  source={{uri:this.state.image1}} style={{height: 50,width: 50}}>

            <View style={{flex: 1,justifyContent: 'flex-end',alignItems: 'flex-start'}}> //here you can change position of image with justifyContent and alignItems
                 <Image
                  source={ {uri:this.state.image2}}
                  style={{width: 20 , height: 20 ,alignItems: 'center',justifyContent: 'center',borderWidth: 1,borderColor: '#fff',borderRadius: 30}} />
            </View>

    </ImageBackground>

</View>

Answer 3

<ImageBackground style={{width:100, height:100, jsutifyContent:'center}}>
<Image/> //childimage
</ImageBackground

这将帮助您添加带有子图像叠加层的背景图像，并且对我来说非常好。